*4.7. FTIR Spectrometry*

The chemical structure of both the NZ as received and the modified TO@NZ hybrid nanostructure, as well as of the obtained ALG/G, ALG/G/xNZ and ALG/G/xTO@NZ films, was analyzed with IR spectra measurements. An FT/IR-6000 JASCO Fourier transform spectrometer (JASCO, Interlab, S.A., Athens, Greece) was used and the measurements were carried out in the frequency range of 4000–400 cm−<sup>1</sup> . The measured infrared (FT-IR) spectra resulted from 32 scans with 2 cm−<sup>1</sup> resolution.
